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The Science of Everything Podcast

Episode 115: Special Relativity Part 2

The Science of Everything Podcast

James Fodor

Natural Sciences, Science, Social Sciences

4.8750 Ratings

🗓️ 28 February 2021

⏱️ 48 minutes

🧾️ Download transcript

Summary

In the second and final part of this series, I discuss the major consequences of special relativity, including the relativity of simultaneity, time dilation, length contraction, and mass-energy equivalence. I then provide an overview of some of the experimental tests of special relativity, and conclude with an analysis of some alleged paradoxes in relativity, including the twins paradox, and the ladder paradox. Recommended pre-listening is Episode 114: Special Relativity Part 1. If you enjoyed the podcast please consider supporting the show by making a PayPal donation or becoming a Patreon supporter. https://www.patreon.com/jamesfodor https://www.paypal.me/ScienceofEverything

Transcript

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0:00.0

Oh, wow, oh, oh, oh, wow, oh, oh, wow.

0:13.0

Oh, wow.

0:15.0

Oh, my.

0:17.0

Oh, James. Hello, you're listening to The Science of Everything podcast episode 115, Special Relativity Part 2.

0:40.8

I'm your host, James Fodor. So this episode is going to pick up directly from where the previous

0:45.1

episode left off in talking about special relativity. So remember last time I introduced the basic

0:50.9

concepts of relativity and gave a bit of historical background as to how Einstein sort of came up with the key ideas, particularly the constancy of the speed of light, and some of the relevance of results such as the Michaelson-Mawley experiment, as well as looking at some of the phenomena of the classical electromagnetism that were part of his intellectual journey towards devising the

1:14.4

theory of special relativity. What we're going to do in this episode is discuss some of the key

1:19.9

phenomena that result from, essentially from the postulist of special relativity, particularly

1:25.4

the postulate of the constancy of the speed of light.

1:28.6

So we're going to look at important phenomena such as the relativity of simultaneity,

1:34.1

length contraction, time dilation, and the interconversion of energy and matter.

1:39.8

We'll also look at some of the paradoxes or alleged paradoxes of relativity,

1:43.5

including the twin

1:44.8

paradox and the barn ladder paradox.

1:49.2

So recommended pre-listing is unsurprisingly, episode 114, Special Relativity Part 1, pretty much

1:55.4

required to listen to this because I'm just going, picking up straight from where I left off

1:59.3

there, because as I said, it was originally intended to be a single episode. So that being said, let's jump straight in

2:04.9

and start talking about some of the key phenomena of special relativity. So I've already mentioned

2:09.8

some of these, and so I'll move past them fairly quickly, but some of the others will spend

2:13.0

a bit more time on. So one is the relativity of simultaneity. And I've already talked about this before.

2:22.0

Whenever you say an event happens at a given time, so if I say, you know, I work up at 7 a.m., what I'm in there is my waking up and the clock reading 7am occur simultaneously. So those are

...

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